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Don't probe PnP BIOS devices for PICs for now to avoid problems with those

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devices claiming resources that they don't actually use.  The PIC drivers
only register valid interrupt sources, so we don't need to rely on these
drivers to claim invalid IRQs to prevent their use by other drivers.
This commit is contained in:
John Baldwin 2003-11-03 22:22:04 +00:00
parent e9982e75c1
commit 9738024229
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=121995
2 changed files with 6 additions and 18 deletions
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12
sys/amd64/amd64/bios.c
View File

@ -583,20 +583,14 @@ pnpbios_identify(driver_t *driver, device_t parent)
}
/*
* If we are in APIC_IO mode, we should ignore the ISA PIC if it
* shows up. Likewise, in !APIC_IO mode, we should ignore the
* APIC (less important).
* This is significant because the ISA PIC will claim IRQ 2 (which
* it uses for chaining), while in APIC mode this is a valid IRQ
* available for general use.
* Ignore PICs so that we don't have to worry about the PICs
* claiming IRQs to prevent their use. The PIC drivers
* already ensure that invalid IRQs are not used.
*/
#ifdef APIC_IO
if (!strcmp(pnp_eisaformat(pd->devid), "PNP0000")) /* ISA PIC */
continue;
#else
if (!strcmp(pnp_eisaformat(pd->devid), "PNP0003")) /* APIC */
continue;
#endif
/* Add the device and parse its resources */
dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);

12
sys/i386/i386/bios.c
View File

@ -583,20 +583,14 @@ pnpbios_identify(driver_t *driver, device_t parent)
}
/*
* If we are in APIC_IO mode, we should ignore the ISA PIC if it
* shows up. Likewise, in !APIC_IO mode, we should ignore the
* APIC (less important).
* This is significant because the ISA PIC will claim IRQ 2 (which
* it uses for chaining), while in APIC mode this is a valid IRQ
* available for general use.
* Ignore PICs so that we don't have to worry about the PICs
* claiming IRQs to prevent their use. The PIC drivers
* already ensure that invalid IRQs are not used.
*/
#ifdef APIC_IO
if (!strcmp(pnp_eisaformat(pd->devid), "PNP0000")) /* ISA PIC */
continue;
#else
if (!strcmp(pnp_eisaformat(pd->devid), "PNP0003")) /* APIC */
continue;
#endif
/* Add the device and parse its resources */
dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1);